5 new commits pushed to

<https://github.com/RTimothyEdwards/magic/tree/master|master>

by RTimothyEdwards

<https://github.com/RTimothyEdwards/magic/commit/088bb828acbda77bb1f3f57786ee3632ca556e3e|088bb828>

- Corrected an error in the original resistor network simplifying

<https://github.com/RTimothyEdwards/magic/commit/b156e79b2cfbe6b998418b9a95240f2a837eb557|b156e79b>

- Corrected a toolkit error where the callback to check parameter

<https://github.com/RTimothyEdwards/magic/commit/dacbfc4e1f2b41fea2a191139bb162014061edf2|dacbfc4e>

- Found that "extresist" double-counts contacts because no attempt

<https://github.com/RTimothyEdwards/magic/commit/2aa7380cb65707b5e4d1e759a3d6ee6faa08a364|2aa7380c>

- Changed the fix from the last commit by solving the problem in a

<https://github.com/RTimothyEdwards/magic/commit/ce6f7840db3e1f3623addf25c075843f99545f25|ce6f7840>

- Backed up the version by one minor revision because I accidentally RTimothyEdwards/magic